topic Re: I want to know "AP Restart : power cycle" cause in Access Points - Indoor and Outdoor

I want to know "AP Restart : power cycle" cause

phyo_pyi_thit — Thu, 17 Dec 2015 09:02:31 GMT

Hi everyone,
My ZD 3000 was connected with 50 AP ZF 7372. It was not stable. When i check the debug log i found out following. Please suggest me what those mean and how can i fix it.

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Aug 23 18:42:29
WLC01 syslog: eventd_to_syslog():AP[L1AP6@2c:5d:93:3c:1f:a0] detects interference on radio [11g/n] and switches from channel [7] to channel [9].

Aug 24 07:55:19 WLC01 syslog: eventd_to_syslog():AP[L1AP6@2c:5d:93:3c:1f:a0] heartbeats lost

Aug 24 08:15:07 WLC01 syslog: eventd_to_syslog():Lost contact with AP[L1AP6@2c:5d:93:3c:1f:a0]

Aug 24 08:19:21 WLC01 syslog: eventd_to_syslog():AP[L1AP6@2c:5d:93:3c:1f:a0] joins with uptime [67] s and last disconnected reason [AP Restart : power cycle]

Aug 24 08:19:24 WLC01 syslog: eventd_to_syslog():AP[L1AP6@2c:5d:93:3c:1f:a0] cold boot successfully

Aug 24 08:19:24 WLC01 syslog: eventd_to_syslog():AP[2c:5d:93:3c:1f:a0] is online.

Aug 24 08:35:15 WLC01 syslog: eventd_to_syslog():AP[L1AP6@2c:5d:93:3c:1f:a0] heartbeats lost

Aug 24 08:35:40 WLC01 syslog: eventd_to_syslog():AP[L1AP6@2c:5d:93:3c:1f:a0] joins with uptime [67] s and last disconnected reason [AP Restart : power cycle]

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Re: I want to know "AP Restart : power cycle" cause

andrea_coppini — Thu, 17 Dec 2015 14:36:01 GMT

A 'power cycle' is a power off/power on of the AP. In other words, someone or something removed electrical power from the AP, usually by unplugging it.

If this is powered via POE - check your switch
If this is powered via a local DC power supply, check your power outlet

Re: I want to know "AP Restart : power cycle" cause

gar1027 — Thu, 17 Dec 2015 14:53:23 GMT

Actually, whenever an AP loses contact with the ZD, it restarts. The default setting is 10 minutes I believe. So, what you need to figure out is why the AP is losing its connection with the ZD.

Re: I want to know "AP Restart : power cycle" cause

gar1027 — Thu, 17 Dec 2015 16:44:07 GMT

Update: If an AP loses connectivity, the message I see is "AP Restart: Network unreachable reboot", not the "power cycle" you see.

Re: I want to know "AP Restart : power cycle" cause

phyo_pyi_thit — Fri, 18 Dec 2015 02:12:31 GMT

but there is no connection failure between when test ping with zd from ap. any idea?

Re: I want to know "AP Restart : power cycle" cause

andrea_coppini — Fri, 18 Dec 2015 08:11:46 GMT

That is impossible, you might be pinging the wrong IP. The AP rebooted so there had to be a minute or so of disconnection for sure.

As I said, if it's powered by POE, check the logs of the switch and also test the cable. Make sure it's not longer than 60m if CAT5/E or 80m if CAT6

Re: I want to know "AP Restart : power cycle" cause

seanmuir — Mon, 21 Dec 2015 00:32:56 GMT

A 802.3af PoE port delivers 15.4W and is meant to be able to deliver at least 12.95W of power to the end device.

Also if you are running a longer cable, you can use the Microsemi PoE extender to increase your cable run up to 500m:

http://www.microsemi.com/products/poe-systems/poe-extender

Re: I want to know "AP Restart : power cycle" cause

seanmuir — Mon, 21 Dec 2015 00:37:42 GMT

Increase the heartbeat timeout value to the AP to be something like 30mins.

When the network is under load the heartbeat to the AP can get lost and if the AP is constantly busy it will reboot based on your settings.

Re: I want to know "AP Restart : power cycle" cause

thanaphom — Thu, 12 Mar 2026 11:11:49 GMT

What causes "AP Restart: power cycle detected"?